Mostly Tetris and SMB.
Really though I've been on a Mass Effect kick, playing through the trilogy again. Lots of games like Baldurs Gate, Torchlight, etc.
im 33 but still play games i played when i was 7 , i play games from all era's , but the games i put the most hours into are Arma 3 , modded RPG games like Fallout , Elderscrolls etc oh and anything with brutal gore
Im 26 and partners 28 & we play Gw2, Black Desert Online, Albion, Wildstar, League of Legends, HotS, Dawn of War, Hex, Overwatch, Pubg, Paragon (although that'll be shut down next month), hearthstone, ptcgo, the Sims (for exterior design purposes), warframe, rayman, csgo, Titanfall.. He plays COD (I can't stand COD).
There's loads more on steam but haven't played for a while. More into MMOs and MOBAs.
I mostly play pc games.
RuneScape, Destiny 2..
Xb I have Destiny 2, Assassins Creed Unity, Monster Hunter World, Dark Souls 3, CoD ww2.
Ps4, CoD ww2, Last of Us.